Here is John Goodluck in a fairly recent video:
https://www.youtube.com/watch?v=v7x7FpVnPpw

Otherwise you can refer to this website
https://mainlynorfolk.info/folk/records/johngoodluck.html

If you're staying over anywhere near near Bury St Edmunds on Monday evening 1st August there's a Traditional Unaccompanied Singers' night at the Oakes Barn in Bury at 8pm see this site for details
http://www.buryfolkcollective.co.uk/